1645855755007 has 2 divisors, whose sum is σ = 1645855755008. Its totient is φ = 1645855755006.

The previous prime is 1645855754969. The next prime is 1645855755017. The reversal of 1645855755007 is 7005575585461.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1645855755007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1645855755017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 822927877503 + 822927877504.

It is an arithmetic number, because the mean of its divisors is an integer number (822927877504).

Almost surely, 2^{1645855755007} is an apocalyptic number.

1645855755007 is a deficient number, since it is larger than the sum of its proper divisors (1).

1645855755007 is an equidigital number, since it uses as much as digits as its factorization.

1645855755007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29400000, while the sum is 58.

The spelling of 1645855755007 in words is "one trillion, six hundred forty-five billion, eight hundred fifty-five million, seven hundred fifty-five thousand, seven".